Abstract
The electroreduction of thallium (I) on a mercury electrode from its solutions in molten calcium nitrate tetrahydrate has been studied using chronoamperometry, chronopotentiometry, and cyclic voltammetry. The early stages of metal deposition are controlled by a nucleation step as indicated by the maxima in current‐time transients, potential overshoots in potential‐time curves, and an anodic shift of the peak potential of the reduction process in subsequent cyclic voltammetric scans. A three step mechanism has been proposed. The first step, formation of nuclei of thallium metal on the electrode surface and the growth of these nuclei into full monolayer surface coverage, is in quantitative agreement with these results.
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